Rudi, Vina Levia Budiman, Masdiana, Nur Khaerat Nur and Erniati Bachtiar 2025. The Impact of Material Price Fluctuation on Cost Overruns in National Toll Road Infrastructure Projects. Structures, Infrastructure, Planning, Implementation, and Legislation . 1, 2 (Dec. 2025), 12–22. DOI:https://doi.org/10.69855/sipil.v1i2.314.